import numpy as np
a = np.array(
    [[1,2,3],
    [4,5,6]],dtype=np.uint8)
b = np.array([
    [[1,2,3],[4,5,6]],
    [[1,2,3],[4,5,6]]])
print(b.shape)#几行几列几个数
print(b.ndim)#维度
print(b.size)#元素个数
print(b.dtype)#数据类型